Joel Ivy’s 59-second Web video “Astronauts falling on the moon” is a compilation of slips, trips, and pratfalls, all of them in slow motion because the slippers and trippers in question are all astronauts, falling (as advertised), in zero gravity, on the moon. This is weird, amusing stuff (amazingly, we hadn’t seen anything like it before). But the way these astronauts manage to look dignified even as they’re falling on their faces is weirder still.